Abstract: The overview, differences, market supply and demand of amorphous alloy threedimensional coil core dry-type transformers and silicon steel three-dimensional coil core dry-type transformers were introduced, and the advantages and disadvantages of these transformers were analyzed. At present, the procurement of transformers for State Grid and Southern Grid presents a structure mainly consisting of silicon steel transformers and supplemented by amorphous alloy transformers. The current development mode is to form complementary advantages and mutual cooperation between amorphous alloy three-dimensional coil core dry-type transformers and silicon steel three-dimensional coil core dry-type transformers.

Key words: amorphous alloys, silicon steel, dry type transformer